ed-embed/ed-embed.php at master · richeduni/ed-embed · GitHub

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<?php
/*
Plugin Name: UoE Media Hopper Embed
Description: Converts Media Hopper links into video embeds in the WordPress TinyMCE editor.
Author: DLAM Applications Development Team
Version: 1.0
*/

require_once 'OpenGraph.php';
require_once 'classes/class-ed-embed-init-cache.php';
require_once 'classes/class-ed-embed-video-cache.php';


function add_media_hopper_embed_handler() {
	$regex = '#https://media.ed.ac.uk/media/*#i';
	wp_embed_register_handler( 'mediahopper', $regex, 'media_hopper_embed_handler' );
}

add_action( 'init', 'add_media_hopper_embed_handler' );

function media_hopper_embed_handler( $matches, $attr, $url, $rawattr ) {
// function media_hopper_embed_handler( $url ) {
	try {
		$ed_embed_video_cache = new Ed_Embed_Video_Cache();

		$embed = $ed_embed_video_cache->get( $url );

		if ( ! empty( $embed ) ) {
			return $embed;
		}

		// get open graph tags for url
		$openGraph = OpenGraph::fetch( $url );
		// get open graph video url if one exists on the page
		$video_url = $openGraph->getVideoUrl();

		if ( '' !== $video_url ) {
			$embed = "<iframe src='$video_url' width='525' height='394' frameborder='0' allowfullscreen></iframe>";
		}

		$ed_embed_video_cache->save( $url, $embed );

		return $embed;

	} catch ( Exception $e ) {
		return '';
	}
}


/**
 * We pretty much just hijack wp_trim_excerpt below
 * We need to do this to strip out media hopper links
 * because the excerpt will try and render the embed which is very slow if not
 *
 * @param string $text
 * @return mixed|void
 */
function custom_wp_trim_excerpt( $text = '' ) {
	$raw_excerpt = $text;

	if ( '' == $text ) {
		$text = get_the_content( '' );

		$link = '#https://example.com/[^\s]+#i'; //Please provide your data.

		$text = preg_replace( $link, '', $text );

		$text = strip_shortcodes( $text );

		/** This filter is documented in wp-includes/post-template.php */
		$text = apply_filters( 'the_content', $text );
		$text = str_replace( ']]>', ']]&gt;', $text );

		/**
		 * Filters the number of words in an excerpt.
		 *
		 * @since 2.7.0
		 *
		 * @param int $number The number of words. Default 55.
		 */
		$excerpt_length = apply_filters( 'excerpt_length', 55 );
		/**
		 * Filters the string in the "more" link displayed after a trimmed excerpt.
		 *
		 * @since 2.9.0
		 *
		 * @param string $more_string The string shown within the more link.
		 */
		$excerpt_more = apply_filters( 'excerpt_more', ' ' . '[&hellip;]' );
		$text         = wp_trim_words( $text, $excerpt_length, $excerpt_more );
	}
	/**
	 * Filters the trimmed excerpt string.
	 *
	 * @since 2.8.0
	 *
	 * @param string $text        The trimmed text.
	 * @param string $raw_excerpt The text prior to trimming.
	 */
	return apply_filters( 'wp_trim_excerpt', $text, $raw_excerpt );
}

remove_filter( 'get_the_excerpt', 'wp_trim_excerpt' );

add_filter( 'get_the_excerpt', 'custom_wp_trim_excerpt' );

register_activation_hook( __FILE__, 'embed_do_setup' );

/**
 * Create cache when plugin is activated
 *
 * @return void
 */
function embed_do_setup() {
	(new Ed_Embed_Init_Cache())->initialise_mediahopper_table();
}